Mold.



No, 770,189. PATENTED SEPT. 13,-L904. A. SGHOELLHOBN & H. S. ALBRECHT.

, MOLD. APPLICATION FILED JAN. 25, 1904.

N0 MODEL.

TINTTED STATES Patented September 13, 1904.

ATnNT FFICE.

AUGUST SCHOELLHORN AND HERMAN S. ALBRECHT, OF ST. LOUIS, MISSOURI.

MOLD.

SPECIFICATION forming part of Letters Patent N0. 770,189, dated September 13, 1904.

Application filed January 25,1904. Serial No. 190A80. (No model.)

To aZZ whom it may concern:

Be it known that we, AUGUST ScHonLLHoRN and HERMAN S. ALBRECHT, citizens of the United States,residing in the city of St. Louis, in the State of Missouri, have invented certain new and useful Improvements in Molds, of which the following is a full, clear, and exact description, reference being had to the accompanying drawings, forming part of this specification.

Our invention consists in providing a mold in which steel or iron castings are made with a destructible circumferential jacket containing a substance adapted to mix with the molten metal as it is poured into the mold to toughen or harden the metal.

We have shown our invention applied to a mold for casting car-wheels; but it is apparent that it may be used for making other castings.

Figure I is a vertical section of a mold having the destructible jacket to which our invention relates. Fig. II is an enlarged detail vertical section of the mold and jacket. Fig. III is an enlarged detail perspective view showing part of the jacket in plain or uncorrugated form. Fig. IV is a like view showing a jacket of corrugated form. i

Referring to the drawings, 1 represents the drag, and 2 the cope of an ordinary flask.

3 represents the mold with the pattern removed. After the pattern has been removed and before the cope is placed in position we set into the mold-cavity an annular jacket 4,

having an outer wall 5 and an inner wall (Sand having a top flange 7 on the outer wall which fits between the upper and lower parts of the mold, so that the jacket and its contents are held suspended while the mold is being filled with the molten metal. This jacket is made of some material that will be destroyed by the heat of the molten metal, such as thin sheet-iron, paper, or other substance. There is a chamber between the inner and outer walls of the jacket, and this chamber is filled with a substance intended to act upon the molten metal to toughen, harden, or otherwise affect it, and this substance may be manganese, carbon, a mixture of manganese and carbon, or may be some other substance.

As the molten metal is poured into the mold the jacket is destroyed or decomposed and the substance contained therein mingles with the molten metal, as will be readily understood.

By holding the jacket in a suspended position it does not drop down after its lower portion is consumed by the molten metal, the result being that there is an even distribution of the manganese or other substance in the finished casting.

The inner face of the jacket may be smooth, as shown in Fig. III, or it may be corrugated, as shown in Fig. IV. This latter form is preferable in case there should be a tendency or danger of the jacket collapsing or moving downwardly toward the bottom of the mold as the hot metal enters the mold and destroys the lower portions of the jacket. By thus corrugating the mold a series of chambers are formed, each chamber containing its quota of the manganese or other substance, so that when one chamber is destroyed by the hot metal the manganese in the chamber above does not escape until its portion of the jacket is destroyed.

We claim as our invention 1. In a mold, a corrugated destructible hollow jacket located in the mold-cavity, and adapted to hold in its hollow interior a substance designed to mix with the molten metal, the corrugations dividing the jacket into a plurality of chambers, substantially as set forth.

2. In a mold, a destructible hollow jacket suspended along the outer periphery of the mold-cavity and having a corrugated inner surface, said jacket being adapted to hold in its hollow interior, a substance designed to mix with the molten metal, and the corrugations dividing the jacket into a plurality of chambers, substantially as set forth.

3. In a mold, a destructible jacket located 7 in the mold-cavity and having a flange located composition designed to mix with the molten metal, substantially as set forth.

AUGUST SCHOELLHORN. HERMAN S. ALBRECHT.

In presence of NELLIE V. ALEXANDER, E. S. KNIGHT. 

